Laguna Biospheres provide a large living area for beneficial bacteria to thrive. Biospheres efficiently reduce ammonia & nitrite to help maintain healthy pond water conditions & the overall well being of pond fish & plants. Each Biosphere provides 158cm 2 of usable surface area for the proliferation of beneficial bacteria. Biospheres can be used in almost any pond filter, making them more powerful & efficient. Biospheres are also an excellent media for degassing towers. To use place Biospheres after the mechanical filtration chamber. Clean Biospheres using de-chlorinated or debris-free pond water every new pond season.